Hi Nicolas
On 3/13/20 11:42 PM, Nicolas Heemeryck wrote:
Retrieve clock rate through device tree. This mimics the behavior of arm_global_timer in Linux.
Signed-off-by: Nicolas Heemeryck nicolas.heemeryck@gmail.com Cc: Patrice Chotard patrice.chotard@st.com
Changes for v2:
- Fall back on CONFIG_SYS_HZ_CLOCK if clk_get_by_index returns an
error or no clock driver is provided.
drivers/timer/sti-timer.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/timer/sti-timer.c b/drivers/timer/sti-timer.c index eac22ae39b..ff42056abd 100644 --- a/drivers/timer/sti-timer.c +++ b/drivers/timer/sti-timer.c @@ -6,7 +6,9 @@
#include <common.h> #include <dm.h> +#include <clk.h> #include <timer.h> +#include <linux/err.h>
#include <asm/io.h> #include <asm/arch-armv7/globaltimer.h> @@ -41,14 +43,25 @@ static int sti_timer_probe(struct udevice *dev) { struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); struct sti_timer_priv *priv = dev_get_priv(dev);
- uc_priv->clock_rate = CONFIG_SYS_HZ_CLOCK;
struct clk clk;
int err;
ulong ret;
/* get arm global timer base address */ priv->global_timer = (struct globaltimer *)dev_read_addr_ptr(dev); if (!priv->global_timer) return -ENOENT;
err = clk_get_by_index(dev, 0, &clk);
if (!err) {
ret = clk_get_rate(&clk);if (IS_ERR_VALUE(ret))return ret;uc_priv->clock_rate = ret;} else {
uc_priv->clock_rate = CONFIG_SYS_HZ_CLOCK;}
/* init timer */ writel(0x01, &priv->global_timer->ctl);
Acked-by: Patrice Chotard patrice.chotard@st.com
Thanks
Patrice